A debris disk around the central star of the Helix Nebula?

K. Y L Su, Y. H. Chu, George H. Rieke, P. J. Huggins, R. Gruendl, R. Napiwotzki, T. Rauch, W. B. Latter, K. Volk

Research output: Contribution to journalArticle

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Abstract

Excess emission from a pointlike source coincident with the central star of the Helix Nebula is detected with Spitzer at 8, 24, and 70 μm. At 24 μm, the central source is superposed on an extended diffuse emission region. While the [O IV] 25.89 μm line contributes to the diffuse emission, a 10-35 μm spectrum of the central source shows a strong thermal continuum. The excess emission from the star most likely originates from a dust disk with blackbody temperatures of 90-130 K. Assuming a simple optically thin debris disk model, the dust is distributed in a ring between ∼35 and ∼150 AU from the central star, possibly arising from collisions of Kuiper Belt-like objects or the breakup of comets from an Oort-like cloud that have survived from the post-main-sequence evolution of the central star.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume657
Issue number1 II
DOIs
StatePublished - Mar 1 2007

Fingerprint

nebulae
debris
helices
stars
dust
Oort cloud
Kuiper belt
comets
comet
collision
continuums
collisions
rings
temperature

Keywords

  • Infrared: stars
  • Stars: individual (WD 2226-210)
  • White dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Su, K. Y. L., Chu, Y. H., Rieke, G. H., Huggins, P. J., Gruendl, R., Napiwotzki, R., ... Volk, K. (2007). A debris disk around the central star of the Helix Nebula? Astrophysical Journal, 657(1 II). https://doi.org/10.1086/513018

A debris disk around the central star of the Helix Nebula? / Su, K. Y L; Chu, Y. H.; Rieke, George H.; Huggins, P. J.; Gruendl, R.; Napiwotzki, R.; Rauch, T.; Latter, W. B.; Volk, K.

In: Astrophysical Journal, Vol. 657, No. 1 II, 01.03.2007.

Research output: Contribution to journalArticle

Su, KYL, Chu, YH, Rieke, GH, Huggins, PJ, Gruendl, R, Napiwotzki, R, Rauch, T, Latter, WB & Volk, K 2007, 'A debris disk around the central star of the Helix Nebula?', Astrophysical Journal, vol. 657, no. 1 II. https://doi.org/10.1086/513018
Su KYL, Chu YH, Rieke GH, Huggins PJ, Gruendl R, Napiwotzki R et al. A debris disk around the central star of the Helix Nebula? Astrophysical Journal. 2007 Mar 1;657(1 II). https://doi.org/10.1086/513018
Su, K. Y L ; Chu, Y. H. ; Rieke, George H. ; Huggins, P. J. ; Gruendl, R. ; Napiwotzki, R. ; Rauch, T. ; Latter, W. B. ; Volk, K. / A debris disk around the central star of the Helix Nebula?. In: Astrophysical Journal. 2007 ; Vol. 657, No. 1 II.
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